Answer to Question #15517 in Algebra for Hedy Choo
Mrs Chen is six times as old as her son now. If she is 36 years old now, in how many years’ time will she be three times her son’s age?
Her son is 36/6=6 years old now. In an x year she'll be 36+x and he'll be 6+x she'll be three times older, so (36+x)/(6+x)=3
Answer - in a 9 years.